First, watch this very short bit. Yes, he could very easily have edited the video to make it appear as if there was a problem, but here's the full speech, and there does seem to be a problem. You don't even have to slow it down, as he did, to see the problem. The first part of the problem is right at the beginning, so you don't have to watch her whole speech. Then if you want, you can fast forward to see her waving at the flag.